<template>
    <div>
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>商品分类</el-breadcrumb-item>
        </el-breadcrumb>
        <el-card >
            <el-row>
                <el-col>
                    <el-button type="primary" @click="addCateDialog">添加分类</el-button>
                </el-col>
            </el-row>
            <tree-table class="treeTable"
                :data="catelist" 
                :columns="columns" 
                :selection-type="false"
                :expand-type="false"
                show-index
                index-text="#"
                border
                :show-row-hover="false">
                <template slot="isok" slot-scope="scope">
                    <i v-if="scope.row.cat_deleted===false" class="el-icon-success" style="color:lightgreen;"></i>
                    <i v-else class="el-icon-error" style="color:red;"></i>
                </template>
                <template slot="order" slot-scope="scope">
                    <el-tag v-if="scope.row.cat_level == 0" size="mini">一级</el-tag>
                    <el-tag v-else-if="scope.row.cat_level == 1" type="success" size="mini">二级</el-tag>
                    <el-tag v-else type="warning" size="mini">三级</el-tag>
                </template>
                <template slot="operate" >
                    <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
                    <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
                </template>
            </tree-table>

            <el-pagination
                @size-change="handleSizeChange"
                @current-change="handleCurrentChange"
                :current-page="queryInfo.pagenum"
                :page-sizes="[3, 5, 10, 15]"
                :page-size="5"
                layout="total, sizes, prev, pager, next, jumper"
                :total="total">
            </el-pagination>
        </el-card>

        <el-dialog
            title="添加分类"
            :visible.sync="addCateDialogVisible"
            @closed="closedDialog"
            width="50%">
            <el-form :model="addCateForm" :rules="addCateRules" ref="addCateRef" label-width="100px">
                <el-form-item label="分类名称" prop="cat_name">
                    <el-input v-model="addCateForm.cat_name"></el-input>
                </el-form-item>
                <el-form-item label="父级分类" >
                    <!-- <el-input v-model="addCateForm.cat_pid"></el-input> -->
                    <el-cascader
                        v-model="selectedKeys"
                        :options="parentCateList"
                        clearable
                        change-on-select
                        :props="cascaderProps"
                        @change="handleChange"></el-cascader>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addCateDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addCate">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>
<script>
export default {
    data(){
        return{
            queryInfo:{
                type:3,
                pagenum:1,
                pagesize:5
            },
            catelist:[],
            total:0,
            columns:[
                {
                    label:'分类名称',
                    prop:'cat_name',

                },
                {
                    label:'是否有效',
                    type:'template',
                    template:'isok'
                },
                {
                    label:'排序',
                    type:'template',
                    template:'order'
                },
                {
                    label:'操作',
                    type:'template',
                    template:'operate'
                }
            ],
            addCateDialogVisible:false,
            addCateForm:{
                cat_name:'',
                cat_pid:0,
                cat_level:0
            },
            addCateRules:{
                cat_name:[
                    {
                        required:true,
                        message:'设置分类名称',
                        trriger:blur
                    }
                ],
                cat_pid:[
                    {
                        required:true,
                        message:'设置分类type',
                        trriger:blur
                    }
                ]
            },
            parentCateList:[],
            selectedKeys:[],
            cascaderProps:{ 
                expandTrigger: 'hover',
                value:'cat_id',
                label:'cat_name',
                children:'children'
            }
            
        }
    },
    created(){
        this.getCateList();
    },
    methods:{
        async getCateList(){
            const {data:res} = await this.$http.get('categories',{
                params:this.queryInfo
            })
            if(res.meta.status == 200){
                this.catelist = res.data.result
                this.total = res.data.total;
                this.$message.success(res.meta.msg)
            }else{
                this.$message.error(res.meta.msg)
            }
        },
        handleSizeChange(newSize){
            this.queryInfo.pagesize = newSize;
            this.getCateList();
        },
        handleCurrentChange(pagenum){
            this.queryInfo.pagenum = pagenum;
            this.getCateList();
        },
        addCateDialog(){
            this.getParentCateList();
            this.addCateDialogVisible = true;
        },
        closedDialog(){
            this.$refs.addCateRef.resetFields();
            this.selectedKeys = [];
            this.addCateForm.cat_pid = 0;
            this.addCateForm.cat_level = 0;
            this.addCateDialogVisible = false;
        },
        async getParentCateList(){
            const {data:res} = await this.$http.get('categories',{params:{type:2}})
            if(res.meta.status == 200){
                this.$message.success(res.meta.msg);
                console.log(res.data);
                this.parentCateList = res.data;
            }else{
                this.$message.error(res.meta.msg)
            }
        },
        handleChange(){
            console.log(this.selectedKeys);
            if(this.selectedKeys.length>0){
                this.addCateForm.cat_pid = this.selectedKeys[this.selectedKeys.length - 1]
                this.addCateForm.cat_level = this.selectedKeys.length
                return;
            }else{
                this.addCateForm.cat_pid = 0
                this.addCateForm.cat_level = 0
            }
        },
        addCate(){
            console.log(this.addCateForm);
            this.$refs.addCateRef.validate(async valid=>{
                if(valid){
                    const {data:res} = await this.$http.post('categories',this.addCateForm)
                    if(res.meta.status == 201){
                        this.$message.success(res.meta.msg)
                        this.getCateList();
                        this.addCateDialogVisible = false;
                    }else{
                        this.$message.error(res.meta.msg)
                    }
                }
            })
        }
    }
}
</script>
<style lang="less" scoped>
.treeTable{
    margin-top: 10px;
}
.el-cascader{
    width: 100%;
}
</style>